nouns
the ability to comprehend; to understand and profit from experience
is a type of (narrower)
possession of the qualities (especially mental qualities) required to do something or get something done
"danger heightened his powers of discrimination"
is an attribute of
having the capacity for thought and reason especially to a high degree
"is there intelligent life in the universe?"; "an intelligent question"
is an attribute of
lacking intelligence
"a dull job with lazy and unintelligent co-workers"
a unit responsible for gathering and interpreting information about an enemy
secret information about an enemy (or potential enemy)
"we sent out planes to gather intelligence on their radar coverage"
information about recent and important events
"they awaited news of the outcome"
the operation of gathering information about an enemy